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is found in Earth's crust as several different iron compounds. Calculate the mass (in

Chapter 6, Problem 69P

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QUESTION:

Iron is found in Earth's crust as several different iron compounds. Calculate the mass (in kg) of each compound that contains \(1.0\times10^3\mathrm{\ kg}\) of iron.

(a) \(\mathrm{Fe}_{2} \mathrm{O}_{3}\) (hematite)

(b) \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) (magnetite)

(c) \(\mathrm{FeCO}_{3}\) (siderite)

Questions & Answers

QUESTION:

Iron is found in Earth's crust as several different iron compounds. Calculate the mass (in kg) of each compound that contains \(1.0\times10^3\mathrm{\ kg}\) of iron.

(a) \(\mathrm{Fe}_{2} \mathrm{O}_{3}\) (hematite)

(b) \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) (magnetite)

(c) \(\mathrm{FeCO}_{3}\) (siderite)

ANSWER:

Step 1 of 5

Mole concept mainly gets used in the determination of moles of any given compound or substance. If mass as well as molar mass of given compound is known then its moles can be calculated using the expression,

\(\text { Number of moles }=\frac{\text { Mass }}{\text { Molar mass }}\)

The given mass of iron is \(1.0 \times 10^{3} \mathrm{~kg}\)

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